The H-3 model form with the NHLA will cover you for both 609(g) and provide you an exception from RBP notices, so long as you provide it to each consumer that "requests from the person an extension of credit that is or will be secured by one to four units of residential real property."
I should also note that if you don't provide the exception notice (H-3), you only have to provide a RBP Notice if the person "grants, extends, or otherwise provides credit to that consumer on material terms that are materially less favorable than the most favorable material terms available to a substantial proportion of consumers." So you're consumer that gets a lower rate wouldn't need a RBP (unless some other material term was worse due to info in the credit report).
See Reg V 1022.72 and 74